Enameled wire surface paint retreatment process

Abstract

The invention discloses an enamelled wire surface paint retreatment process, and relates to the field of enamelled wire production. The invention relates to an enameled wire surface paint retreatment process, which comprises the steps of waste enameled wire screening, waste enameled wire paint removal, copper wire drawing and wire rod processing, the depainting step specifically comprises the steps that the waste enameled wire passes through a first wire-drawing die with the two ends turned over, the diameter of the input end of the turned first wire-drawing die is smaller than that of the output end, a depainting hole with the same diameter as the copper wire of the waste enameled wire is formed in the first wire-drawing die, the first wire-drawing die conducts depainting treatment on the waste enameled wire, and the copper wire is obtained; in the wire drawing step, a second wire drawing die is placed according to the initial state, the diameter of the input end of the second wire drawing die is larger than that of the output end, the copper wire is subjected to wire drawing through the second wire drawing die, and the copper wire is extruded and drawn through the multiple second wire drawing dies with the output end diameters sequentially reduced to obtain a wire. The technology for removing the paint film on the surface of the enameled wire and recycling the copper wire is low in cost.

Description

Technical Field

[0001] The invention relates to the production field of enameled wires, in particular to a process for reprocessing surface paint of enameled wires. Background Art

[0002] Enameled wire is the main raw material for products such as motors, electrical appliances and household appliances. It is a main type of winding assembly and consists of two parts: conductor and insulation layer. Enameled wire is made by annealing and softening the bare wire, and then painting and baking it multiple times.

[0003] In the production process of enameled wire, sometimes unqualified enameled wire is produced, such as inappropriate process settings of the production line, unqualified paint quality, etc., resulting in defects such as bubbles and putty in the paint film, which is called waste enameled wire and needs to be recycled. The recycling of enameled wire means removing the paint film on the surface of the waste enameled wire and recycling the copper wire as raw material.

[0004] The common methods for removing the paint on the surface of enameled wire are pyrolysis removal, solution cleaning or mechanical removal. The production process of enameled wire includes the steps of blank preparation - wire drawing - cleaning - annealing - cooling - paint baking - lubrication - wire winding. The existing recycling of enameled wire often requires special recycling equipment and special paint stripping equipment for processing, which is costly. Summary of the invention

[0005] In order to provide a low-cost process for removing the paint film on the surface of the enameled wire and recycling the copper wire, the present application provides an enameled wire surface paint reprocessing process.

[0006] The application provides a process for reprocessing the surface paint of enameled wire using the following technical solution: A process for reprocessing the surface paint of an enameled wire comprises the following steps: 1) Screening steps for waste enameled wire: The wires that have been painted and cured by baking are inspected for quality. The wires pass the quality inspection component. The wires with defects in the paint film cannot pass the quality inspection component and are screened out to form waste enameled wires together with the discarded enameled wires after use. 2) Steps for removing paint from waste enameled wire: The waste enameled wire is passed through a first wire drawing die with both ends turned over, wherein the input end diameter of the turned first wire drawing die is smaller than the output end diameter, and a paint stripping hole having the same diameter as the copper wire of the waste enameled wire is provided in the first wire drawing die, and the first wire drawing die performs paint stripping treatment on the waste enameled wire to obtain a copper wire; 3) Copper wire drawing steps: The second wire drawing die is placed in an initial state, the diameter of the input end of the second wire drawing die is larger than the diameter of the output end, the copper wire is drawn through the second wire drawing die, and the copper wire is extruded and drawn through a plurality of second wire drawing dies with successively smaller output end diameters to obtain a wire material; 4) Wire processing steps: The wire after extrusion and drawing is subsequently processed, and the repainted wire is quality inspected. Products that fail the quality inspection are picked out and the above steps are repeated. The wire that passes the quality inspection is coated with lubricant on the surface and is taken up to obtain enameled wire for storage.

[0007] By adopting the above technical scheme, the quality inspection component can screen the wires with defects in the paint film, thereby obtaining waste enameled wires; by flipping the drawing die used in the original enameled wire production, the presence of the paint stripping holes forms a blade-like effect, so that the flipped first drawing die can scrape off the surface paint of the waste enameled wire to obtain the internal copper wire; the internal copper wire can continue to be extruded and drawn through the second drawing die placed in the initial state, and continue to perform processing steps such as painting, thereby achieving the removal of the surface paint film of the waste enameled wire and the recycling of the internal copper wire.

[0008] By flipping the wire drawing die, the wire drawing die can achieve both wire drawing and paint stripping. When removing the surface paint film, there is no need to use an additional paint stripping device or recovery device, and the production cost is lower.

[0009] Optionally, the quality inspection component includes a detection tube and an energized guide wheel. The enameled wire passes through the detection tube and then through the energized guide wheel. The detection tube is used to detect bubbles in the paint film and putty in the wire, and the energized guide wheel is used to detect faults in the paint film and bare wires in the wire.

[0010] By adopting the above technical solution, the presence of the detection tube and the energized guide wheel can respectively detect different aspects of the wire, so that the wires with bubbles, putty, bare wires, and paint film faults can be screened out, increasing the possibility of screening out unqualified products.

[0011] Optionally, in step 2) and step 3), the first wire drawing die and the second wire drawing die are both placed in a wire drawing machine, and the pulling force of the wire drawing machine drives the waste enameled wire to pass through the first wire drawing die and through the paint stripping hole to achieve paint stripping, and the pulling force of the wire drawing machine drives the copper wire to pass through the second wire drawing die to achieve extrusion drawing.

[0012] By adopting the above technical solution, the waste enameled wire is driven to be transported by the wire drawing machine, so that the paint stripping step and the wire drawing step of the waste enameled wire are connected, saving space and site.

[0013] Optionally, in step 2), a guide sleeve is connected to the front of the first wire drawing die with both ends flipped, and the diameter of the guide sleeve gradually decreases along the conveying direction of the waste enameled wire, the diameter of the input end of the first wire drawing die gradually decreases in the direction approaching the paint stripping hole, and the diameter of the output end of the first wire drawing die gradually increases in the direction away from the paint stripping hole.

[0014] By adopting the above technical solution, the setting of the guide sleeve facilitates the waste enameled wire to pass through the guide sleeve and enter the first wire drawing die, thereby guiding the transmission of the waste enameled wire. The first wire drawing die forms a blade at the paint stripping hole through the change of diameter, so that the paint film on the surface can be smoothly removed through the paint stripping hole; similarly, the first wire drawing die can achieve a good wire drawing effect in its original state through the diameter setting.

[0015] Optionally, the output end of the first wire drawing die is divided into an output section and an extension section. Assuming that the length of the paint stripping hole is l1, the diameter of the paint stripping hole is d, the length of the output section is l2, and the length of the extension section is l3, then: l1=(0.2-0.4)·d, l2=1-(1.3-1.5)·d, l3=(0.5-0.8)·d.

[0016] By adopting the above technical scheme and limiting the above length, the ratio of the length and diameter of the paint stripping hole makes the paint stripping hole form a relatively thin point, increasing the sharp effect similar to the tip of a knife, which is convenient for paint stripping; an output end and an extension section with different diameters are set at the output end, so that when the first wire drawing die is drawing, the wire drawing has a high smoothness and a low wire breakage rate.

[0017] Optionally, in step 3), the input end diameter of the second wire drawing die is equal to the diameter of the paint stripping hole. When drawing the copper wire, the copper wire is first stretched at a speed of 500-600m / min to a diameter 2.5-4 times that of the final wire, and then stretched at a speed of 850-950m / min to a diameter of the final wire.

[0018] By adopting the above technical solution, the copper wire is stretched to the final diameter through two wire drawing processes, so that the performance indicators such as the tensile strength of the produced enameled wire are improved, ensuring that the enameled wire can meet the use requirements.

[0019] Optionally, the detection tube includes a middle working area and sizing areas at both ends, the inner diameter of the working area is smaller than the inner diameter of the sizing area, and the outer diameter of the sizing area is larger than the outer diameter of the working area. The detection tube is placed on a support bracket, and the support bracket is provided with multiple support grooves, and the working area is inserted into the support grooves.

[0020] By adopting the above technical solution, when the enameled wire passes through the detection tube, the inner diameter of the working area is the same as the diameter of the enameled wire. When there are defects such as bubbles and putty on the enameled wire, the diameter of the enameled wire is larger than the inner diameter of the working area, and the enameled wire cannot pass through the detection tube and becomes a defective product. The support groove and the working area are arranged to facilitate the placement of the detection tube on the support frame.

[0021] Optionally, the powered guide wheel is placed on a pipe rack, the pipe rack is provided with a placement tube, the powered guide wheel is connected to the placement tube via a clamp, the powered guide wheel is electrically connected to a powered sensor, and the pipe rack is connected to a power source for energizing the powered guide wheel.

[0022] By adopting the above technical solution, the power supply provides the power source for the energized guide wheel, and the enameled wire passes through the energized guide wheel. When there are bare wires or paint film faults on the enameled wire, due to insufficient insulation performance, the enameled wire is connected to the energized guide wheel to generate current, and the energized sensor will display an alarm, thereby screening out unqualified products.

[0023] Optionally, subsequent processing includes the following steps: Cleaning: Clean the wire obtained by wire drawing to remove oil and particles on the surface of the wire; Annealing and cooling: annealing and cooling the cleaned wire; Painting and baking: The surface of the wire is painted multiple times and then baked and cured.

[0024] By adopting the above technical solution and setting the processing steps, the production of enameled wire can be achieved, the electrical conductivity and mechanical properties of the enameled wire can be improved, and the use requirements can be met.

[0025] In summary, the present application has at least one of the following beneficial effects: 1. The quality inspection component can screen the wires with defects in the paint film to obtain waste enameled wires; by flipping the drawing die in the original enameled wire production, the existence of the paint stripping hole forms a blade-like effect, so that the flipped first drawing die can scrape the surface paint of the waste enameled wire to obtain the internal copper wire; the internal copper wire can continue to be extruded and drawn through the second drawing die placed in the initial state, and continue to carry out processing steps such as painting, thereby realizing the removal of the surface paint film of the waste enameled wire and the recycling of the internal copper wire.

[0026] 2. By flipping the wire drawing die, the wire drawing die can achieve both wire drawing and paint stripping. When removing the surface paint film, there is no need to use an additional paint stripping device or recovery device, and the production cost is lower.

[0027] 3. The ratio of the length and diameter of the paint stripping hole makes the paint stripping hole form a relatively thin area, which increases the sharp effect similar to the tip of a knife and facilitates paint stripping; an output end and an extension section with different diameters are set at the output end, so that when the first wire drawing die is drawing, the wire drawing has a high smoothness and a low wire breakage rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a flow chart of the surface paint reprocessing process of the enameled wire of the present application; Figure 2 It is a structural schematic diagram of the enameled wire production device of the present application; Figure 3 It is a schematic diagram of the structure of the quality inspection component of the enameled wire of this application; Figure 4 It is a schematic diagram of the structure of the enameled wire paint stripping device and the copper wire drawing device of the present application; Figure 5 It is a cross-sectional schematic diagram of the enameled wire paint stripping device and the copper wire drawing device of the present application; Figure 6 It is a cross-sectional schematic diagram of the first wire drawing die of the present application.

[0029] Description of reference numerals: 1. Unwinding mechanism; 11. Wire drawing mechanism; 12. Paint drying mechanism; 13. Winding mechanism; 2. Quality inspection component; 21. Support frame; 22. Support slot; 3. Detection tube; 31. Sizing area; 32. Working area; 4. Tube rack; 41. Tube placement; 42. Clamp; 43. Power guide wheel; 5. First wire drawing die; 51. Input end; 52. Paint stripping hole; 53. Output end; 531. Output section; 532. Extension section; 6. Guide sleeve; 7. Second wire drawing die; 71. Wire drawing machine; DETAILED DESCRIPTION The following is combined with Figure 1-6 This application is described in further detail.

[0030] The present application embodiment discloses a process for reprocessing the surface paint of an enameled wire. Figure 1 A process for reprocessing the surface paint of an enameled wire comprises the following steps: 1) Screening steps for waste enameled wire: The waste enameled wires in this application are composed of two parts: unqualified products in production and enameled wires discarded after use. In production, due to factors such as paint quality and painting process, some enameled wires with unqualified paint films will be produced. At this time, the unqualified enameled wires cannot be stored and sold anymore, and the paint film should be removed and then reprocessed.

[0031] The production of enameled wire can be divided into the following steps: blank preparation, wire drawing, cleaning, annealing, cooling, painting and baking. Figure 2, the production process and equipment of enameled wire are as follows: Blank preparation: Prepare copper as blank. The copper material should be industrial pure copper with a purity of more than 99.95% and a conductivity of no less than 98%. When preparing the copper material, check whether its size is within the tolerance range and ensure that there are no defects such as oxidation, burrs or cracks on the copper material. Wire drawing: The unwinding mechanism 1 drives the copper wire to be transported, and the copper material passes through the wire drawing mechanism 11, and multiple wire drawing dies are used to extrude and draw the copper material, and the copper material reaches the final diameter; Cleaning: Clean the copper material after drawing to remove the oil and particles on the surface; Annealing: The cleaned copper material is placed in an annealing furnace for annealing; Cooling: Cooling the annealed copper; Painting and baking: The copper material is painted on the surface by using the painting and drying mechanism 12, and then baked and cured after painting, and the enameled wire is obtained after curing.

[0032] After the enameled wire is painted and baked, a quality inspection step is performed, and the enameled wire passes the quality inspection component 2. Wires with defects in the paint film cannot pass the quality inspection component 2. Therefore, unqualified enameled wires can be screened out through quality inspection, and together with the enameled wires discarded after use, they constitute waste enameled wires.

[0033] Reference Figure 3 The quality inspection component 2 specifically includes a detection tube 3 and an energized guide wheel 43, wherein the enameled wire first passes through the detection tube 3 and then through the energized guide wheel 43. The detection tube 3 includes a working area 32 and a sizing area 31, wherein the working area 32 is located in the middle of the detection tube 3, and the sizing area 31 is connected to both ends of the working area 32, wherein the outer diameter of the sizing area 31 is greater than the outer diameter of the working area 32, and the inner diameter of the sizing area 31 is greater than the outer diameter of the working area 32. When the enameled wire passes through the detection tube 3, it first passes through the sizing area 31 and then passes through the working area 32. The diameter of the working area 32 is the sum of the diameters of the enameled wire, i.e., the copper wire and the paint film. When there are defects such as bubbles and putty in the paint film of the enameled wire, the diameter of the enameled wire is greater than the inner diameter of the working area 32, and at this time, the enameled wire cannot pass through the detection tube 3 and becomes a defective product. The detection tube 3 is placed on a support frame 21, which is provided with a plurality of support grooves 22. The support grooves 22 extend to one side of the support frame 21. The working area 32 of the detection tube 3 is inserted into the support grooves 22, and the sizing area 31 is located above the support grooves 22, so that the detection tube 3 can be placed.

[0034] The power guide wheel 43 is placed on the pipe rack 4. The pipe rack 4 includes a horizontal placement tube 41. The placement tube 41 is located above the support frame 21. The power guide wheel 43 is connected to the placement tube 41 through a clamp 42 to achieve the installation of the power guide wheel 43. A power supply is provided on the pipe rack 4. The power supply is connected to the power guide wheel 43 to charge the power guide wheel 43. The power guide wheel 43 is electrically connected to a power sensor. When the enameled wire has a bare wire or a paint film fault, the insulation performance of the enameled wire is poor. When passing through the power guide wheel 43, it will conduct electricity to generate current, so that the power sensor will alarm, so that unqualified enameled wires with bare wires and paint film faults can be screened out.

[0035] 2) Steps for removing paint from waste enameled wire: For the selected waste enameled wires, the paint film is removed to expose the copper wire inside, and the copper wire is re-drawn and painted to achieve the recycling of the copper wire.

[0036] Reference Figure 4 and Figure 5 The device used in the paint stripping step is a first wire drawing die 5 with both ends flipped. The first wire drawing die 5 was originally a die used for extruding and drawing copper wire. After flipping both ends, the first wire drawing die 5 can strip the waste enameled wire to obtain the internal copper wire.

[0037] The first wire drawing die 5 after flipping includes an input end 51, a paint stripping hole 52 and an output end 53 which are arranged in sequence. The diameter of the input end 51 is smaller than the diameter of the output end 53, and the diameter of the paint stripping hole 52 is the same as the diameter of the copper wire in the waste enameled wire. In the first wire drawing die 5, the diameter of the input end 51 gradually decreases in the direction close to the paint stripping hole 52, and the diameter of the output end 53 gradually increases in the direction away from the paint stripping hole 52, thereby forming a blade-like effect at the paint stripping hole 52 by presenting a narrow and then wide diameter inside. When the waste enameled wire passes through the first wire drawing die 5, after reaching the paint stripping hole 52 from the input end 51, the surface paint film is removed under the exploitation of the blade of the paint stripping hole 52, and the copper wire inside passes through the paint stripping hole 52 and the output end 53 to obtain the paint stripped copper wire.

[0038] Reference Figure 6 In the first wire drawing die 5, assuming that the length of the paint stripping hole 52 is l1 and the diameter of the paint stripping hole 52 is d, then: l1=(0.2-0.4)·d. By setting the ratio of the length and diameter of the paint stripping hole 52, the first wire drawing die 5 is thinner at the paint stripping hole 52, and a sharp knife tip is formed at the paint stripping hole 52, which has a better effect of removing the surface paint film of the waste enameled wire.

[0039] When the first wire drawing die 5 is placed normally in its original state, it can be used to draw copper wire. At this time, the front diameter of the first wire drawing die 5 is larger than the rear diameter. In order to achieve a better wire drawing effect, the output end 53 of the first wire drawing die 5 is divided into an output section 531 and an extension section 532. The output section 531 and the extension section 532 have different degrees of inclination. Assuming the length of the output end 53 is l2 and the length of the extension section 532 is l3, then: l2=1-(1.3-1.5)·d, l3=(0.5-0.8)·d.

[0040] By setting the lengths of the output section 531 and the extension section 532 in a specific ratio, the first wire drawing die 5 can achieve high wire finish and low wire breakage rate when drawing the copper wire. By flipping the wire drawing die, the wire drawing die can achieve both wire drawing and paint stripping.

[0041] A guide sleeve 6 is arranged in front of the first wire drawing die 5 with both ends turned over. The guide sleeve 6 is arranged in a trumpet shape and its diameter gradually decreases along the conveying direction of the waste enameled wire. The guide sleeve 6 is used to guide the conveying of the waste enameled wire and facilitate the waste enameled wire to enter the first wire drawing die 5.

[0042] 3) Copper wire drawing steps: After the waste enameled wire is stripped of paint, the copper wire inside can be obtained. At this time, the copper wire can continue to be drawn to obtain wire with a smaller diameter. The wire can be recycled and continued to be painted to form a new enameled wire.

[0043] When drawing the copper wire, first stretch the copper wire at a speed of 500-600m / min to a diameter 2.5-4 times that of the final wire, and then stretch the copper wire at a speed of 850-950m / min to a diameter equal to the final wire diameter. Drawing in two stages is beneficial to improving the mechanical properties of the wire. Tests show that the tensile strength, elongation at break and other indicators of the wire are improved after stretching.

[0044] Reference Figure 4 and Figure 5 For the wire drawing of copper wire, the second wire drawing die 7 is used. The second wire drawing die 7 is set according to the initial state, and the input end diameter is larger than the output end diameter. The overall structural setting and proportional relationship of the second wire drawing die 7 are the same as those of the first wire drawing die 5, and still include the input end 51, the paint stripping hole 52, the output section 531 and the extension section 532, but the placement state is opposite to the first wire drawing die 5 during paint stripping. At this time, the port where the copper wire enters the second wire drawing die 7 (the input end of the second wire drawing die 7) is on the side of the output end 53 of the first wire drawing die 5, and the port where the copper wire extends out of the second wire drawing die 7 (the output end of the second wire drawing die 7) is on the side of the input end 51 of the first wire drawing die 5.

[0045] The difference between the second wire drawing die 7 and the first wire drawing die 5 lies in the difference in diameter. The purpose of the first wire drawing die 5 is to strip paint, so the diameter of the paint stripping hole 52 is set to the diameter of the copper wire, and only the internal copper wire can pass through the paint stripping hole 52 and the output end 53; the purpose of the second wire drawing die 7 is to extrude and draw wires, and the diameter of the input end is set to the diameter of the paint stripping hole 52 of the first wire drawing die 5, that is, the diameter of the copper wire. The copper wire enters the second wire drawing die 7, and as the diameter from the input end of the second wire drawing die 7 to the paint stripping hole 52 is reduced, the diameter of the copper wire is also reduced to achieve wire drawing.

[0046] Attached Figure 4 Only one second wire drawing die 7 is drawn. In actual production, the second wire drawing die 7 includes multiple wire drawing dies with different diameters. Through multiple wire drawing dies arranged in sequence and with decreasing diameters, the diameter of the copper wire is gradually reduced to the final diameter. The length relationship of d, l1, l2 and l3 in the second wire drawing die 7 still exists, so that the second wire drawing film can achieve high smoothness of wire drawing and low wire breakage rate.

[0047] In production, the first wire drawing die 5 and the second wire drawing die 7 are both placed in the wire drawing machine 71. The waste enameled wire is driven by the pulling force of the wire drawing machine 71 to pass through the first wire drawing die 5 and then continue to pass through the second wire drawing die 7. The waste enameled wire passes through the paint stripping hole 52 in the first wire drawing die 5 to achieve paint stripping. The copper wire obtained by paint stripping continues to pass through the second wire drawing die 7 by the pulling force of the wire drawing machine 71 to achieve extrusion drawing. The wire drawing machine 71 connects the paint stripping step of the waste enameled wire and the wire drawing step of the copper wire, saving space and site.

[0048] 4) Wire processing steps: After the wire drawing is completed, the wire is processed to obtain a new enameled wire. The subsequent processing is consistent with the production process and equipment of the enameled wire. Figure 2 , specifically including the following steps: Cleaning: Clean the wire obtained by wire drawing to remove oil and particles on the surface of the wire; Annealing and cooling: annealing and cooling the cleaned wire; Painting and baking: The surface of the wire is painted multiple times and then baked and cured.

[0049] The new enameled wire continues to undergo quality inspection steps, and the products that fail the quality inspection are picked out and the above steps are repeated. The wires that pass the quality inspection are coated with lubricant on the surface and are wound through the winding mechanism 13. The enameled wires are placed in a warehouse for storage, completing the recycling and reprocessing of the waste enameled wires.

[0050] The implementation principle of the enameled wire surface paint reprocessing process in the embodiment of the present application is: The wires are painted and baked to obtain enameled wires, and the enameled wires are quality inspected. Wires with bubbles and putty in the paint film cannot pass through the detection tube 3, and wires with faults and bare wires in the paint film cannot pass through the energized guide wheel 43. Unqualified products and enameled wires discarded after use are screened out to form waste enameled wires; The wire drawing machine 71 drives the enameled wire to be conveyed. After passing through the guide sleeve 6, the enameled wire enters the first wire drawing die 5 with both ends turned over. When passing through the paint stripping hole 52, the paint is stripped to obtain the internal copper wire. The internal copper wire passes through the paint stripping hole 52 and the output end 53 and enters the second wire drawing die 7. The copper wire is drawn into the final diameter through the diameter change of the second wire drawing die 7 to obtain the wire material. The wire is cleaned, annealed, cooled, painted and baked. After the quality inspection is passed, the enameled wire is coated with lubricant, rolled and stored, and the surface paint of the waste enameled wire is removed and the copper wire is recycled and reprocessed. This specific implementation is only an explanation of the present application, and it is not a limitation of the present application. After reading this specification, those skilled in the art can make modifications to the specific implementation as needed without creative contribution, but as long as it is within the scope of the claims of the present application, it is protected by the patent law.

Claims

1. A process for reprocessing the surface paint of an enameled wire, characterized in that: The following steps are involved: 1) Screening steps for waste enameled wire: The wires that have been painted and cured by baking are subjected to quality inspection, and the wires are passed through the quality inspection component (2). The wires with defects in the paint film cannot pass through the quality inspection component (2), are screened out, and are combined with the enameled wires discarded after use to form waste enameled wires; 2) Steps for removing paint from waste enameled wire: The waste enameled wire is passed through a first wire drawing die (5) with both ends turned over, the diameter of the input end (51) of the turned over first wire drawing die (5) is smaller than the diameter of the output end (53), the first wire drawing die (5) is provided with a paint stripping hole (52) having the same diameter as the copper wire of the waste enameled wire, and the first wire drawing die (5) performs paint stripping treatment on the waste enameled wire to obtain a copper wire; 3) Copper wire drawing steps: The second wire drawing die (7) is placed in an initial state, the diameter of the input end of the second wire drawing die (7) is larger than the diameter of the output end, the copper wire is drawn through the second wire drawing die (7), and the copper wire is extruded and drawn through a plurality of second wire drawing dies (7) with successively smaller output end diameters to obtain a wire material; 4) Wire processing steps: The wire after extrusion and drawing is subsequently processed, and the repainted wire is quality inspected. Products that fail the quality inspection are picked out and the above steps are repeated. The wire that passes the quality inspection is coated with lubricant on the surface and is taken up to obtain enameled wire for storage.

2. The process for reprocessing the surface paint of an enameled wire according to claim 1, characterized in that: In step 1), the quality inspection component (2) includes a detection tube (3) and an energized guide wheel (43). The enameled wire passes through the detection tube (3) and then through the energized guide wheel (43). The detection tube (3) is used to detect the presence of bubbles and putty in the paint film, and the energized guide wheel (43) is used to detect the presence of faults and bare wires in the paint film.

3. The process for reprocessing the surface paint of an enameled wire according to claim 1, characterized in that: In step 2) and step 3), the first wire drawing die (5) and the second wire drawing die (7) are both placed in a wire drawing machine (71), and the pulling force of the wire drawing machine (71) drives the waste enameled wire to pass through the first wire drawing die (5) and through the paint stripping hole (52) to achieve paint stripping, and the pulling force of the wire drawing machine (71) drives the copper wire to pass through the second wire drawing die (7) to achieve extrusion drawing.

4. The process for reprocessing the surface paint of an enameled wire according to claim 1, characterized in that: In step 2), a guide sleeve (6) is connected to the front of the first wire drawing die (5) with both ends flipped, and the diameter of the guide sleeve (6) gradually decreases along the conveying direction of the waste enameled wire, the diameter of the input end (51) of the first wire drawing die (5) gradually decreases in the direction approaching the paint stripping hole (52), and the diameter of the output end (53) of the first wire drawing die (5) gradually increases in the direction away from the paint stripping hole (52).

5. The process for reprocessing the surface paint of an enameled wire according to claim 4, characterized in that: In step 2), the output end (53) of the first wire drawing die (5) is divided into an output section (531) and an extension section (532). Assuming that the length of the paint stripping hole (52) is l1, the diameter of the paint stripping hole (52) is d, the length of the output section (531) is l2, and the length of the extension section (532) is l3, then: l1=(0.2-0.4)·d, l2=1-(1.3-1.5)·d, l3=(0.5-0.8)·d.

6. The process for reprocessing the surface paint of an enameled wire according to claim 1, characterized in that: In step 3), the input end diameter of the second wire drawing die (7) is equal to the diameter of the paint stripping hole (52). When drawing the copper wire, the copper wire is first stretched at a speed of 500-600 m / min to a diameter 2.5-4 times that of the final wire, and then stretched at a speed of 850-950 m / min to a diameter equal to the diameter of the final wire.

7. The process for reprocessing the surface paint of an enameled wire according to claim 2, characterized in that: The detection tube (3) comprises a working area (32) in the middle and sizing areas (31) at both ends, the inner diameter of the working area (32) is smaller than the inner diameter of the sizing area (31), and the outer diameter of the sizing area (31) is larger than the outer diameter of the working area (32). The detection tube (3) is placed on a support frame (21), and the support frame (21) is provided with a plurality of support grooves (22), and the working area (32) is inserted into the support grooves (22).

8. The process for reprocessing the surface paint of an enameled wire according to claim 2, characterized in that: The energized guide wheel (43) is placed on a pipe rack (4), the pipe rack (4) is provided with a placement tube (41), the energized guide wheel (43) is connected to the placement tube (41) via a clamp (42), the energized guide wheel (43) is electrically connected to a energized inductor, and the pipe rack (4) is connected to a power source for energizing the energized guide wheel (43).

9. The process for reprocessing the surface paint of an enameled wire according to claim 1, characterized in that: In step 4), the subsequent processing includes the following steps: Cleaning: Clean the wire obtained by wire drawing to remove oil and particles on the surface of the wire; Annealing and cooling: annealing and cooling the cleaned wire; Painting and baking: The surface of the wire is painted multiple times and then baked and cured.

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